项目的页面和will_paginate [英] Item's page and will_paginate

问题描述

我有一些照片是通过will_paginate插件分割在连续的页面上的.当您打开照片然后使用链接返回所有照片时，您始终会返回首页(例如，该照片显示在第5页上，打开照片，单击链接以显示所有照片并期望您正在再次进入第5页，但您位于第1页).

I have some photos that are split on successive pages through will_paginate plugin. When you open a photo and then return to all photos using a link, you always return to the first page (e.g. the photo is displayed on page 5, you open the photo, click a link to show all photos and expect that you are on page 5 again, but you are on page 1).

现在，有什么方法可以获取照片所属的页码吗?

Now, is there any method to get the page number to which a photo belongs to?

我尝试传递GET参数，但这仅在用户不再执行任何其他操作(例如发表评论，编辑照片等)时才有效.

I tried to pass a GET parameter, but this only works if the user doesn't perform any more actions (e.g. post a comment, edit photo, ecc.).

推荐答案

page = (number_of_records_before_RECORD / number_of_records_per_page) + 1

换句话说.如果您的照片的ID为40，并且之前有25条记录(假设某些记录已被删除)，每页20条记录:

In other words. If your photo has ID 40 and there are 25 records before (assuming some records have been deleted), with 20 records per page:

page = (25 / 20) + 1 = 2

您可以使用Model.count(:conditions => ['id < ?', record.id], :order => 'id')计算所选记录之前的记录数. 正确的查询取决于列出所有对象时对表应用的排序筛选器.

You can count the number of records before the selected record using Model.count(:conditions => ['id < ?', record.id], :order => 'id'). The right query depends on which sorting filter you apply to that table when listing all objects.

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